Colors look great in FCPX.

After I export (Share > Master file > H.264 Quicktime) they look a bit dull: desaturated, less vibrant.

I realise compression is lossy but is this expected? Should I over-saturate the video in FCPX a bit to compensate?

I saw some very technical forum posts talking about color-space conversions last time I googled for this, suggesting maybe Quicktime uses the wrong 'matrix'. I am not a video pro but the visual difference does remind me of what can happen with RGB > CMYK and colour profiles in the print world.

At first I thought it was only after upload to YouTube, but the issue is there when I play back the exported .mov too.

Does anyone have any tips or info?

Colors look great in FCPX.

After I export (Share > Master file > H.264 Quicktime) they look a bit dull: desaturated, less vibrant. Also sort of like the wrong gamma curve - shadows are darker.

I realise compression is lossy but is this expected? Should I over-saturate the video in FCPX a bit to compensate?

I saw some very technical forum posts talking about color-space conversions last time I googled for this, suggesting maybe Quicktime uses the wrong 'matrix'. I am not a video pro but the visual difference does remind me of what can happen with RGB > CMYK and colour profiles in the print world.

At first I thought it was only after upload to YouTube, but the issue is there when I play back the exported .mov too.

Does anyone have any tips or info?